/* Antikvariat & Galerie Valentinska — Website #125
   Antiquarian & Gallery × Exhibition-Index Modernism
   Fully offline. HTML + CSS only. */

:root{
  --paper:#f4efe6;
  --light:#fbf8f1;
  --char:#292b2a;
  --burgundy:#743f4c;
  --olive:#7b8066;
  --stone:#a39f97;
  --brass:#b39a69;
  --line:rgba(41,43,42,.14);
  --serif:Georgia,"Times New Roman",serif;
  --sans:Arial,Helvetica,sans-serif;
  --mono:"Courier New",Courier,monospace;
  --shadow:0 18px 44px rgba(39,34,31,.09)
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--char);
  background:
    linear-gradient(180deg,rgba(116,63,76,.035),transparent 18rem),
    var(--paper);
  font-family:var(--sans);line-height:1.6;overflow-x:hidden
}
a{color:inherit}
.shell{width:min(1160px,calc(100% - 40px));margin-inline:auto}
.section{padding:5rem 0;scroll-margin-top:7rem}

.skip-link{position:fixed;left:1rem;top:1rem;z-index:999;padding:.7rem 1rem;background:var(--char);color:#fff;text-decoration:none;transform:translateY(-160%)}
.skip-link:focus{transform:none}

.site-header{position:sticky;top:0;z-index:50;border-bottom:1px solid var(--line);background:rgba(244,239,230,.95);backdrop-filter:blur(10px)}
.header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:2rem}
.brand{display:grid;text-decoration:none;line-height:1}
.brand-main{font-family:var(--serif);font-size:1.08rem;font-weight:400;letter-spacing:.015em}
.brand-sub{margin-top:.24rem;color:var(--burgundy);font-family:var(--mono);font-size:.61rem;letter-spacing:.1em}

.main-nav,.footer-nav{display:flex;flex-wrap:wrap;gap:1.1rem}
.main-nav a,.footer-nav a{text-decoration:none;font-size:.78rem;letter-spacing:.04em}
.main-nav a{padding:.45rem 0;border-bottom:1px solid transparent}
.main-nav a:hover,.main-nav a:focus-visible,.footer-nav a:hover,.footer-nav a:focus-visible{color:var(--burgundy);border-color:currentColor}

.hero{padding:4.7rem 0 5.4rem;scroll-margin-top:7rem}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.06fr) minmax(390px,.94fr);gap:clamp(3rem,7vw,7rem);align-items:center}
.eyebrow{margin:0 0 .8rem;color:var(--burgundy);font-family:var(--mono);font-size:.7rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase}
.catalog-ref{display:grid;grid-template-columns:auto 1fr auto;gap:.75rem;align-items:center;max-width:610px;margin-bottom:1rem;color:var(--stone);font-family:var(--mono);font-size:.64rem;letter-spacing:.08em}
.catalog-rule{height:1px;background:var(--line)}
.hero-brand{display:grid;gap:.08rem;margin-bottom:1rem}
.hero-brand span{font-family:var(--serif);font-size:1rem;letter-spacing:.035em}
.hero-brand span:last-child{color:var(--olive)}

h1,h2,h3{margin-top:0}
h1,h2{font-family:var(--serif);font-weight:400;letter-spacing:-.04em}
h1{max-width:830px;margin-bottom:1.3rem;font-size:clamp(3.8rem,7.7vw,7.1rem);line-height:.95}
h2{margin-bottom:1rem;font-size:clamp(2.4rem,4.9vw,4.2rem);line-height:1}
h3{margin-bottom:.45rem;font-family:var(--serif);font-size:1.45rem;font-weight:400}
p{margin-top:0;color:#615d58}
.hero-text{max-width:650px;margin-bottom:1.8rem;font-size:1.04rem}

.cta{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:.82rem 1.3rem;border:1px solid var(--char);background:var(--char);color:#fff;text-decoration:none;font-size:.78rem;font-weight:800;letter-spacing:.09em;text-transform:uppercase;transition:transform .2s ease,box-shadow .2s ease}
.cta:hover,.cta:focus-visible{transform:translateY(-2px);box-shadow:0 12px 28px rgba(41,43,42,.18)}

.hero-note{display:grid;grid-template-columns:46px 1fr;gap:.9rem;max-width:570px;margin-top:2rem}
.hero-note p{margin-bottom:0;font-family:var(--mono);font-size:.75rem}
.index-glyph{position:relative;width:42px;height:42px;border:1px solid var(--char);background:var(--light)}
.index-glyph::before{content:"";position:absolute;left:8px;top:8px;width:24px;height:2px;background:var(--burgundy);box-shadow:0 8px 0 var(--olive),0 16px 0 var(--brass)}
.index-glyph::after{content:"";position:absolute;right:-6px;bottom:-6px;width:18px;height:18px;border:1px solid var(--char);background:var(--paper)}

.hero-visual{position:relative;min-height:540px;overflow:hidden;border:1px solid var(--line);background:linear-gradient(145deg,rgba(123,128,102,.045),transparent 60%),var(--light);box-shadow:var(--shadow)}
.archive-grid{position:absolute;inset:0;background:linear-gradient(rgba(41,43,42,.028) 1px,transparent 1px) 0 0/48px 48px,linear-gradient(90deg,rgba(41,43,42,.028) 1px,transparent 1px) 0 0/48px 48px}

.museum-label{position:absolute;left:30px;top:30px;width:285px;padding:1rem;border:1px solid var(--char);background:rgba(244,239,230,.96)}
.museum-label span,.museum-label strong,.museum-label small{display:block}
.museum-label span,.museum-label small{font-family:var(--mono);font-size:.58rem;letter-spacing:.08em}
.museum-label span{color:var(--burgundy)}
.museum-label strong{margin:.35rem 0;font-family:var(--serif);font-size:1.05rem;font-weight:400;line-height:1.25}
.museum-label small{color:var(--olive)}
.label-rule{height:1px;margin-top:.9rem;background:var(--line)}

.frame{position:absolute;border:5px solid var(--char);background:transparent}
.frame-a{right:46px;top:50px;width:162px;height:210px}
.frame-b{left:45%;bottom:54px;width:128px;height:164px;border-color:var(--burgundy)}

.spine-stack{position:absolute;right:56px;bottom:50px;display:flex;align-items:flex-end;gap:7px}
.spine-stack i{display:block;width:24px;border:1px solid var(--char);background:var(--paper)}
.spine-stack i:nth-child(1){height:132px;background:var(--burgundy)}
.spine-stack i:nth-child(2){height:112px;background:var(--olive)}
.spine-stack i:nth-child(3){height:146px;background:var(--brass)}
.spine-stack i:nth-child(4){height:122px;background:var(--stone)}
.spine-stack i:nth-child(5){height:138px;background:var(--char)}

.catalog-number{position:absolute;left:44px;bottom:74px;width:108px;height:108px;display:grid;place-items:center;border:1px solid var(--char);background:var(--paper);text-align:center}
.catalog-number span{font-family:var(--mono);font-size:.55rem;color:var(--burgundy)}
.catalog-number strong{font-family:var(--serif);font-size:1.85rem;font-weight:400}

.caption-card{position:absolute;left:176px;bottom:68px;width:118px;padding:.6rem;border-left:4px solid var(--olive);background:var(--paper)}
.caption-card span{display:block;font-family:var(--mono);font-size:.52rem;color:var(--stone)}
.caption-card strong{display:block;margin-top:.2rem;font-family:var(--serif);font-size:.95rem;font-weight:400}

.fine-line{position:absolute;height:2px}
.fl-a{left:36px;bottom:46px;width:260px;background:var(--burgundy)}
.fl-b{right:42px;top:282px;width:160px;background:var(--brass)}
.corner-ref{position:absolute;left:30px;bottom:20px;color:var(--stone);font-family:var(--mono);font-size:.56rem}

.about-section{background:linear-gradient(90deg,rgba(163,159,151,.08),transparent 34%),#faf7f0}
.about-grid{display:grid;grid-template-columns:70px .9fr 1.1fr;gap:clamp(1.8rem,4vw,4rem);align-items:start}
.section-index{color:var(--stone);font-family:var(--mono);font-size:.72rem;letter-spacing:.12em}
.about-copy{padding-top:1.35rem;border-top:1px solid var(--line)}
.about-copy p{font-size:1.02rem}
.section-heading{display:grid;grid-template-columns:70px 1fr;gap:clamp(1.8rem,4vw,4rem);margin-bottom:2rem}

.collection-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}
.index-card{position:relative;min-height:325px;overflow:hidden;border:1px solid var(--line);background:var(--light)}
.card-top{display:flex;align-items:center;justify-content:space-between;padding:.9rem 1rem;border-bottom:1px solid var(--line);color:var(--stone);font-family:var(--mono);font-size:.62rem}
.index-mark{width:26px;height:26px;border:5px solid}
.index-mark.burgundy{border-color:var(--burgundy)}
.index-mark.olive{border-color:var(--olive)}
.index-mark.brass{border-color:var(--brass)}
.card-band{min-height:70px;display:flex;align-items:center;padding:0 1rem;color:#fff;font-size:1.22rem;font-weight:800;letter-spacing:.08em}
.band-charcoal{background:var(--char)}
.band-burgundy{background:var(--burgundy)}
.band-olive{background:var(--olive)}
.card-copy{padding:1.5rem 1rem 3rem}
.card-copy p{margin-bottom:0}
.spine-accent{position:absolute;right:20px;bottom:34px;width:54px;height:36px;border-left:8px solid var(--burgundy);border-right:8px solid var(--olive);background:var(--brass);opacity:.65}
.card-foot{position:absolute;left:1rem;bottom:1rem;color:var(--stone);font-family:var(--mono);font-size:.58rem}

.process-section{padding-top:4rem;padding-bottom:4rem}
.process-panel{position:relative;overflow:hidden;padding:clamp(2rem,5vw,4rem);border:1px solid var(--line);background:linear-gradient(rgba(41,43,42,.025) 1px,transparent 1px) 0 0/36px 36px,linear-gradient(90deg,rgba(41,43,42,.025) 1px,transparent 1px) 0 0/36px 36px,#ebe8e0}
.process-heading{display:grid;grid-template-columns:70px 1fr;gap:clamp(1.8rem,4vw,4rem);max-width:860px;margin-bottom:3rem}
.process-heading p:last-child{max-width:700px}
.process-grid{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem}
.process-step{position:relative;min-height:185px;padding:1.2rem;border:1px solid var(--line);background:rgba(251,248,241,.88)}
.process-no{display:block;margin-bottom:1rem;color:var(--burgundy);font-family:var(--mono);font-size:.64rem}
.process-frame{display:block;width:46px;height:52px;margin-bottom:1rem;border:3px solid var(--char);box-shadow:inset 0 0 0 6px var(--paper),inset 0 0 0 8px var(--brass)}
.process-step strong{display:block;font-family:var(--serif);font-size:1.2rem;font-weight:400}
.process-rule{display:block;width:58px;height:2px;margin-top:.8rem;background:var(--olive)}
.process-step small{position:absolute;left:1.2rem;bottom:1rem;color:var(--stone);font-family:var(--mono);font-size:.58rem}

.process-spines{position:absolute;right:0;display:flex;gap:6px;opacity:.15}
.ps-a{top:52px}
.ps-b{bottom:42px;right:6%}
.process-spines::before,.process-spines::after{content:"";display:block;width:20px;height:120px;background:var(--burgundy);box-shadow:28px 0 0 var(--olive),56px 0 0 var(--brass)}
.ps-b::before,.ps-b::after{height:86px}
.process-label{position:absolute;right:4%;bottom:10%;font-family:var(--mono);font-size:.8rem;color:rgba(41,43,42,.17)}

.closing-section{background:#efebe3}
.closing-grid{display:grid;grid-template-columns:1fr minmax(330px,.8fr);gap:clamp(3rem,7vw,7rem);align-items:center}
.closing-copy{max-width:700px}
.closing-art{position:relative;min-height:290px;overflow:hidden;border:1px solid var(--line);background:var(--light)}
.closing-label{position:absolute;left:26px;top:26px;width:250px;padding:1rem;border:1px solid var(--char);background:rgba(244,239,230,.96)}
.closing-label span,.closing-label strong,.closing-label small{display:block}
.closing-label span,.closing-label small{font-family:var(--mono);font-size:.58rem;letter-spacing:.08em}
.closing-label span{color:var(--burgundy)}
.closing-label strong{margin:.25rem 0;font-family:var(--serif);font-size:1.02rem;font-weight:400;line-height:1.25}

.closing-frame{position:absolute;border:4px solid}
.cf-a{right:38px;top:34px;width:105px;height:132px;border-color:var(--char)}
.cf-b{right:70px;top:68px;width:70px;height:92px;border-color:var(--burgundy)}
.closing-spines{position:absolute;right:40px;bottom:38px;display:flex;align-items:flex-end;gap:6px}
.closing-spines i{display:block;width:20px;border:1px solid var(--char)}
.closing-spines i:nth-child(1){height:88px;background:var(--burgundy)}
.closing-spines i:nth-child(2){height:72px;background:var(--olive)}
.closing-spines i:nth-child(3){height:96px;background:var(--brass)}
.closing-spines i:nth-child(4){height:80px;background:var(--stone)}
.closing-index{position:absolute;left:38px;bottom:36px;width:78px;height:78px;display:grid;place-items:center;border:1px solid var(--char);background:var(--paper);text-align:center}
.closing-index span{font-family:var(--mono);font-size:.52rem;color:var(--burgundy)}
.closing-index strong{font-family:var(--serif);font-size:1.35rem;font-weight:400}
.closing-line{position:absolute;left:132px;height:2px}
.cl-a{bottom:44px;width:34%;background:var(--burgundy)}
.cl-b{bottom:64px;width:22%;background:var(--olive)}

.legal-section{background:#dedad2}
.legal-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}
.legal-card{padding:2rem;border:1px solid var(--line);background:rgba(251,248,241,.72)}
.legal-card h2{font-size:clamp(2rem,3.4vw,3rem)}
.legal-card p:last-child{margin-bottom:0}

.site-footer{padding:2rem 0;border-top:1px solid var(--line);background:#dedad2}
.footer-grid{display:flex;justify-content:space-between;align-items:flex-end;gap:2rem}
.footer-brand{display:grid;gap:.15rem}
.footer-brand strong{font-family:var(--serif);font-size:1rem;font-weight:400}
.footer-brand span{color:var(--burgundy);font-family:var(--mono);font-size:.6rem}

@media(max-width:980px){
  .header-inner{min-height:auto;padding:1rem 0;align-items:flex-start;flex-direction:column;gap:.7rem}
  .hero-grid,.closing-grid{grid-template-columns:1fr}
  .hero-visual{min-height:460px}
  .about-grid{grid-template-columns:56px 1fr}
  .about-copy{grid-column:2}
  .collection-grid{grid-template-columns:1fr}
  .index-card{min-height:245px}
  .process-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .legal-grid{grid-template-columns:1fr}
}
@media(max-width:700px){
  .shell{width:min(100% - 28px,1160px)}
  .section{padding:4rem 0}
  h1{font-size:clamp(3.2rem,16vw,5rem)}
  h2{font-size:clamp(2.2rem,10vw,3.1rem)}
  .hero{padding-top:3rem}
  .catalog-ref{grid-template-columns:1fr}
  .catalog-rule{display:none}
  .hero-visual{min-height:410px}
  .museum-label{left:20px;top:20px;width:220px}
  .frame-a{right:20px;top:36px;width:104px;height:136px}
  .frame-b{left:48%;bottom:48px;width:92px;height:118px}
  .spine-stack{right:22px;bottom:36px}
  .spine-stack i{width:18px}
  .catalog-number{left:20px;bottom:62px;width:78px;height:78px}
  .caption-card{left:112px;bottom:58px;width:100px}
  .about-grid,.section-heading,.process-heading{grid-template-columns:1fr;gap:.8rem}
  .about-copy{grid-column:auto}
  .process-grid{grid-template-columns:1fr}
  .process-step{min-height:145px}
  .footer-grid{flex-direction:column;align-items:flex-start}
}
@media(max-width:480px){
  .main-nav{display:grid;grid-template-columns:repeat(3,auto);justify-content:start;gap:.55rem 1rem}
  .main-nav a{font-size:.72rem}
  .hero-visual{min-height:365px}
  .museum-label{max-width:68%;padding:.8rem}
  .frame-a{right:10px;transform:scale(.82)}
  .spine-stack{transform:scale(.8);transform-origin:bottom right}
  .caption-card{display:none}
  .closing-label{left:18px;top:18px;max-width:68%}
  .closing-frame{transform:scale(.82)}
  .closing-spines{transform:scale(.82);transform-origin:bottom right}
  .legal-card,.process-panel{padding:1.35rem}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important}
}